演示gzip压缩响应正文数据

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.util.zip.GZIPOutputStream;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class MyServletDemo2 extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

String data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";

byte b[] = data.getBytes();

System.out.println("原始数据的大小：" + b.length);

// GZIP压缩

// 创建一个带有缓存的内存输出流

ByteArrayOutputStream out = new ByteArrayOutputStream();

GZIPOutputStream gout = new GZIPOutputStream(out);

gout.write(b);

gout.close();

// 输出压缩到缓冲流中的数据(响应正文)

b = out.toByteArray();

System.out.println("压缩后的数据大小：" + b.length);

// 通知客户端数据的压缩编码

response.setHeader("Content-Encoding", "gzip");

// 通知客户端响应正文的数据大小,静态页面响应速度快

response.setHeader("Content-Length", b.length+"");

response.getOutputStream().write(b);

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

doGet(request, response);

}

}